Improvement in weft-stop mechanism in looms



naar ema JESSE D. COTTRELL, OF HOPEDALE, MASSACHUSETTS,

Leners Patent No. 89,561, @ma May 4, 1869.

IMPROVEMENT IN WEET-STOP MEOHANISM IN LOOMS.

The Schedule referred to inthese-Letters Patent-and making part ofthesame.

To all persons to whom these presents may come:

Be it known that I, J Essa D. GoT'rnELL, of Hope dale, in the county ofWorcester, and State of Massachusetts, have made a new and usefulInvention, having reference to Looms for Weaving Cloth; and I do herebydeclare the saine to be fully described in 'the following specification,and representedin the accompanying drawings, of which- Figure 1 is a topview,

Figure 2, a front elevation, and

Figure 3, an end view of the frame and sundry parts of a fancy loom,with Amy invention applied thereto.

The n. ture of my invention may be thus set forth, it consisting in thecombination and arrangement of a separate lever, with the filling-fork,when such level'` is combined with other mechanism for operating theshipper, such separate lever being for the purpose, among others, ofpreventing a shuttle, when, during its iight, it .may .be caught back ofthe fork, from causing breakage of the fork, as is liable to take placewhen the filling-fork is restrained from swinging forward. v

Also, in the combination of a cammed arm, or-its mechanical equivalent,applied to and so as to be operated. by the illing-fork,substantially'in manner as hereinafter described, with a shelf orbracket, a recip rocating pitman, and its eccentric or their equivalent,and with a bent lever applied to the harness-operative mechanism, thetakefup n1ecl1anism,the leto mechanism, and the drop-box operativemechanism, or either of such mechanisms, substantially in manner ashereinafter described, the object of the said combination being, onthebreakage of a weftthread, during the throw of a shuttle, to so throw outof operation either or each of such mechanisms, that the beating of thelay caused by its momentum, after release ofthe shipper, shall not putinoperation either or each of the said mechanisms, so as to require anyresetting or 'rcadjustment of parts, before the'next pick or throw ofthe shuttle can take place.

Also, in the arrangement of thc tension-spring of the whip-roller, orwarp-guide, on the upright rod of such guide, and within the worm-shaft,and against a shoulder therein; such arrangement serving, not only toprotect the spring from dust, or other accumulations, or injury, butenabling the spring to o'perate with friction, to prevent the worm-shaftfrom revolving ont of time.

filling-fork, G or G', which is a bent and furcated leg ver, having itslonger arm arranged within and pivoted to the standard, the pinor pivotbeing as shown at d in fig. 4, which is a vertical section of thestandard, the filling-fork, and the adjacent parts.

There is applied to the lay, in front of each fillingfork, one of twogrids or racks,H H', of the kind ordinarily used.

Within each standard, and resting on the tail of the filling-forkthereof, is a separate lever, I, whose fulcrum is at or near its rearend.

The said lever I, by a rod, g, is connected with an arm, e, projectingfroma rocker-shaft, 'f, arranged within the breast-beam, (see Figure 5,)which is an inner side view of the breast-beam and the mechanismconnected therewith.

From the shaft f another arm, h, projects, and, by a rod, i, isconnected with an arm, k, extending-from a short shaft, l, arrangedbelow the shaft j, and going through one of the end-parts of theloom-frame.

Both ofthe rods y and i are jointed to the respective parts with whichthey are connected.

From the outer end of the shaft l, the cammed arm L extends, over andupon a shelf or bracket, M,'pro jecting from the loom-frame.

Figure 6 is a top view, and g Figure 7 a side elevation of the saidcammed arm, it consisting of an arm provided with an inclined plane orcam, m., which is formed and extended from the arm, in manner as shownin the'drawings.

A pitman, N, is arranged on the shelf M, and applied to anV eccentric,O, fixed to the lay-shaft, such shaft, while in revolution, producing areciprocating movement of the pitman, relatively to the shorter armof abent lever, P, which has for -its fnlcrnm the main shaft n of thetake-up motion, or mechanism.

The said shaft n is supported in a bearing or bracket, o, and has fixedon it a ratchet, p, and a pinion, q.

An impelling-pawl, 1', pivoted to the shorter arm of the lever P, restson the toothedperipliery of the ratchet, and serves, by the'vbrations ofthe lever P, to actuate the ratchet, and, of course, the take-upmechanism, which may be supposed to be of the ordinary kind, of Awhichthe ratchet and its shaft constitute a part.

In the drawings, three rods, s t u, are represented as jointed to thelever P, and extendedfrom it.

The h'rst of these rods, viz, s, is also jointed to the horizontalrocker-lever fu, which carries thev impellingpawl tv of the let-odmechanism, such pawl being to operate against the ratchet x of theworm-shaft y.

A worm, or screw, z, on the shaft y, engages with' a gear, a', fixed ona shaft, b', arranged and provided with a pinion, c, as shown in thedrawings.

rlhe said ratchet x, lever vn, pawl vw, worm-shaft y, screw z, worm-geara', and pinion c1, constitute parts ofa ietodmechanism in common use,the yarn-- beam being supposed to be geared to the pinion.

The rod t is 'jointed to the lever c2 of the draw-pawl d of the ratchete of the drop-box operating mechanism.

The drop-box, shown atIt, as applied to the lay, is such filling-fork,force it back, or cause it to turn and supported by its arm f', upon thelonger arm of a lever, y.

This leveris provided with a triangular cam, 71.',

which operates with a toothed wheel, t', fixed on the shaft of theratchet c.

The lever P, while in movement, produces a corresponding movement of thesaid lever o2, whereby the draw-pawl d will set in motion its ratchet,and there. by effect the movement of the drop-box.

The rod Au connects the lever P with the lever S, which carries theimpelling-pawl T.

This pawl operates the toothed wheel U of the toothed drum V, by whichthe set of levers W, connected with the harness-carriers Z Z, 85o., areoperated, in order to eectt-he necessary changes of the harnesses, asmay be required during the process of weaving. l

The lifter-lever, which acts in connection with the set of' levers WV,is shown at X, and its operative cams at Y, these latter being fixed onthe shaft E. This apparatus, for operating the harnesses, is well knownFrom the shaftk ofthe warp-guide, or whip-roller, an arm, Z', extends toa vertical rod, mjthe rod being passed through the arm, and providedwith adjustable collars n' o', one of which is above, and the otherbelow the arms.

Each of the said collars is furnished with a setscrew, p', to enable thecollar to be clamped to the rod.

The rod m carries the sector g, by which the impelling-pawl w is keptout of action upon the ratch et The said sector, fixed to the rod m' bya set screw, is adjustable vertically on the rodand rests on the top ot'a shelf or bracket, fr'.'

Therod passes through the bracket, and `extends down within theworm-shaft a which is tubular.v

A helical spring, s, (see Figure 8, which is a, seotion of thewormshaft,) envelops. that part of the rod which is within theworm-shaft, and the ,said spring rests on a foot, t', fixed to the lowerpart of the rod.

The upper end vof the spring bears against a shonlf der, a', at theupper part of the worm shaft.

By pressing against the shoulder, thespring keeps the worm-shaft fromrevolving out of time.

This application of the spring saves the necessity of employing thefrictionfpulley and band, generally used with the let-ofi` mechanism.

The belt-shipper is to be so arranged that, while the shorter arm of thelever P is in the act of being moved backward by the pitman, such arm ora pro jection from it shall be forced against the shipper, so as tothrow it o its retaining-shoulder and set it iiee in order that it mayspring and shift the driving-belt from the fast to the loose pulley.

From the above, it will be seen that while the weft, during a throw ofthe shuttle, may remain unbroken, it will lie against one of the gridsor racks ofl the llving-forks, so that, when the lay may beat up, theweft,

resting against the grid, will, by its action against effect theeleva'tion of the cammed arm L.

This will enable the pitman N, during its advance, to pass directlyunderneath the cam m ofthe said arm, and meet and move the lever P, soas to actuatc each of the various mechanisms connected therewith.

But should the weft-thread, during a throw of the shuttle, not remainintact, or become broken, neither of the filling-forks will be actuatedby it, when the lay beats up.

Consequently, the cammed arm L will remain down upon its bracket orshelf', and the pitman, in advancing, will moet and pass up the cam m'ofthe said arm, and over the top ofthe upright arm of the lever P.

Thus, under these circumstances, no movement of such lev'er, or thevarious mechanisms connected with it, will be produced, although the laymay continue to move after the shipper may have been set free, so as tocast the driving-belt of the -loom off the drivingpulley and upon theloose pulley.

The next time, theweft may be properly thrown across the race-beam ofthe lay, the harness-mechanism, the take-np mechanism, and the let-offmechanism will be again properly thrown into operation, and without thenecessity'of any adjustment of the harnesses, by the attendant, in orderto bring the right ones into action, to prevent irregularity of weavingof the figure or figures.

I claim the filling-fork Gas constructed, not only as a bent andfurcated lever, support-ed on a pivot, or fnlcrum, d, as described, butas disconnected from and with its horizontall arm disposed underneathand against an arm, or lever, I7 combined with mechanism as explained,or its equivalent, for operating the shipper, the whole beingsubstantially specified and represented, and to enable the illing-fork,when a shuttle, during its flight, may be caught in the Warp and borne.against the backs of the prongs ofthe fork, to move, so as to allowtheshuttle to pass yit without causing breakage ofthe fork or any part ofthe mechanism for actuating the shipper. I also claim the combination ofthe cammed arm L, or its-mechanical equivalent, applied to, and so as tobe operated by the filling-fork, in manner and by means substantially asdescribed, with the shelf, or bracket M, the reciprocating pitman N, andits eccentric O, or their equivalent, and with the bent lever P, appliedto the harness-operative mechanism, the takeup mechanism, the let-oft`mechanism, and the drop-box operative mechanism, or either of the saidmechanisms, substantially in manner as specified.

I also claim the arrangement of the tension-spring s', of thewhip-roller, or warp-guide, on the upright rod m' of such guide, andwithin the worm-shaft y, and against a shoulder, n', therein, the wholebeing substantially as, and to effect advantages as hereinbeforeexplained.

JESSE D. COTTRELL. Witnesses:

WM. F. DRAPER, GEORGE DRAPER.

